Consulta: subjectFacets:"Pollen"
Registros recuperados: 68
Data/hora: 06/06/2024 03:46:35

Pollen morphology of Cyclanthera and Sicyos species (Cucurbitaceae, Sicyoeae)
Provedor de dados: 66
Autores: Lima,Luis F. P.; Miotto,Silvia T. S.
Pollen morphology of eight species of Cyclanthera and three species of Sicyos was studied using light and scanning electron microscopy. Pollen grains of Cyclanthera have a mean polar diameter of 51.40 µm, and an equatorial mean diameter of 49.10 µm, a prolate spheroidal shape (P/E = 1.11), 4-7 zonocolporate, with circular endoapertures, and punctitegilate exine. Pollen grains of Sicyos have a mean polar diameter of 50.60 µm and a mean equatorial diameter of 61.30 µm, an oblate spheroidal shape (P/E = 0.88), 8-12 colpate, supra and microreticulate echinate exine. Differences among the genera and species are discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbitaceae; Pollen; Sicyoeae.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932011000100001

Arqueobotánica del museo nacional de las culturas, Ciudad de México
Provedor de dados: 32
Autores: Galván Escobedo, Iris Grisel.
El Museo Nacional de las Culturas  (MNC) ubicado en el centro histórico de la ciudad de México, es un edificio que fue construido en 1734  sobre los  restos de la antigua ciudad de México -Tenochtitlán habitada por los mexicas (1324-1521). En el MNC se realizaron excavaciones arqueológicas con el objeto de recuperar información histórica relacionada con el sitio,  tendientes a una restauración integral del edificio y su posterior adecuación museográfica. De los trabajos arqueológicos  se derivó esta tesis que tuvo como finalidad recuperar los restos vegetales contenidos en los depósitos sedimentológicos de las excavaciones arqueológicas, para establecer las condiciones paleoecológicas de la región  y el posible uso de plantas. Se analizaron 50 muestras de...
Palavras-chave: Arqueobotánica; Sedimentos; Semillas; Maderas; Polen; Archaeobotany; Sediments; Seeds; Wood; Pollen; Maestría; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/142

Arqueobotánica del museo nacional de las culturas, Ciudad de México
Provedor de dados: 32
Autores: Galván Escobedo, Iris Grisel.
El Museo Nacional de las Culturas  (MNC) ubicado en el centro histórico de la ciudad de México, es un edificio que fue construido en 1734  sobre los  restos de la antigua ciudad de México -Tenochtitlán habitada por los mexicas (1324-1521). En el MNC se realizaron excavaciones arqueológicas con el objeto de recuperar información histórica relacionada con el sitio,  tendientes a una restauración integral del edificio y su posterior adecuación museográfica. De los trabajos arqueológicos  se derivó esta tesis que tuvo como finalidad recuperar los restos vegetales contenidos en los depósitos sedimentológicos de las excavaciones arqueológicas, para establecer las condiciones paleoecológicas de la región  y el posible uso de plantas. Se analizaron 50 muestras de...
Palavras-chave: Arqueobotánica; Sedimentos; Semillas; Maderas; Polen; Archaeobotany; Sediments; Seeds; Wood; Pollen; Maestría; Botánica.
Ano: 2010
URL: http://hdl.handle.net/10521/142

Aportaciones al estudio de Claviceps africana Frederickson, Mantle &amp; de Milliano en la producción de semilla de líneas de sorgo en Valles  Centrales de México
Provedor de dados: 32
Autores: Cisneros López, Eugenia.
El ergot (Claviceps africana) es un riesgo para la producción de semilla en líneas  androestériles del sorgo (Sorghum bicolor L. Moench). Para estudiar la relación entre las  características florales, receptividad del estigma, interacción planta-hospedero y producción  de semilla en polinización manual y abierta se realizaron cinco experimentos con líneas A,  B y R adaptadas a los Valles Altos Centrales de México (2200 msnm), en condiciones de  campo. Los resultados indicaron que existen diferencias en las características florales, pero  la mayor variación se observó en la producción de semilla y sus componentes; estas  últimas, igual que la producción de polen viable, fueron las que interaccionaron más con el  ambiente. La cantidad de polen de las líneas...
Tipo: Tesis
Palavras-chave: Pistilo; Polen; Polinización; Receptividad; Sincronía floral; Doctorado; Producción de semillas; Sorghum bicolor; Pistil; Pollen; Pollination; Receptivity; Floral synchrony.
Ano: 2008
URL: http://hdl.handle.net/10521/1248

Chromosomal and morphological studies of diploid and polyploid cytotypes of Stevia rebaudiana (Bertoni) Bertoni (Eupatorieae, Asteraceae)
Provedor de dados: 74
Autores: Oliveira,Vanessa M. de; Forni-Martins,Eliana R.; Magalhães,Pedro M.; Alves,Marcos N.
In this study, we examined the chromosome number and some morphological features of strains of Stevia rebaudiana. The chromosomes were analyzed during mitosis and diakinesis, and the tetrad normality and pollen viability were also assessed. In addition, stomata and pollen were measured and some plant features were studied morphometrically. All of the strains had 2n = 22, except for two, which had 2n = 33 and 2n = 44. Pairing at diakinesis was n = 11II for all of the diploid strains, whereas the triploid and tetraploid strains had n = 11III and n = 11IV, respectively. Triploid and tetraploid plants had a lower tetrad normality rate than the diploids. All of the strains had inviable pollen. Thus, the higher the ploidy number, the greater the size of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asteraceae; Pollen; Polyploidy; Stevia rebaudiana; Stevioside; Stomata.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200015

Meiosis in elephant grass (Pennisetum purpureum), pearl millet (Pennisetum glaucum) (Poaceae, Poales) and their interspecific hybrids
Provedor de dados: 74
Autores: Techio,Vânia Helena; Davide,Lisete Chamma; Pereira,Antônio Vander.
The cultivated and sexually compatible species Pennisetum purpureum (elephant grass, 2n = 4x = 28) and Pennisetum glaucum (pearl millet, 2n = 2x = 14) can undergo hybridization which favors the amplification of their genetic background and the introgression of favorable alleles into breeding programs. The main problem with interspecific hybrids of these species is infertility due to triploidy (2n = 3x = 21). This study describes meiosis in elephant grass x pearl millet hybrids and their progenitors. Panicles were prepared according to the conventional protocol for meiotic studies and Alexander’s stain was used for assessing pollen viability. Pearl millet accessions presented regular meiosis with seven bivalents and high pollen viability. For elephant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meiosis; Pennisetum; Elephant grass; Interspecific hybrids; Pearl millet; Pollen.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200025

High-resolution vegetation history of West Africa during the last 145 ka
Provedor de dados: 5
Autores: Dalibard, Mathieu; Popescu, Speranta-maria; Maley, Jean; Baudin, Francois; Melinte-dobrinescu, Mihaela-carmen; Pittet, Bernard; Marsset, Tania; Dennielou, Bernard; Droz, Laurence; Suc, Jean-pierre.
The essential characteristics of the vegetation dynamics of tropical Africa remain only partially known. This study assesses the succession of vegetation-types over Central Africa during the last two glacial/interglacial cycles. Analysis of core KZai 02, which contains pollen from the Zaire River watershed (latitudes 9°N-13°S), allows the investigation of long-term patterns of plant ecosystem development and their climatic causes. Core KZai 02 (18.20 m long) was recovered from 6°24.20′S/9°54.10′E in the uppermost axial edifice of the Zaire deep sea fan. The chronology of this sedimentary archive was established using nannofossils and correlations of pollen and total organic carbon signals with the nearby core GeoB1008. The pollen record indicates that: (i)...
Tipo: Text
Palavras-chave: Central Africa; Climate; Environmental parameters; Late Pleistocene; Pollen; Vegetation dynamics.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00199/31031/29436.pdf

The Ponto-Caspian basin as a final trap for southeastern Scandinavian Ice-Sheet meltwater
Provedor de dados: 5
Autores: Tudryn, Alina; Leroy, Suzanne A. G.; Toucanne, Samuel; Gibert-brunet, Elisabeth; Tucholka, Piotr; Lavrushin, Yuri A.; Dufaure, Olivier; Miska, Serge; Bayon, Germain.
This paper provides new data on the evolution of the Caspian Sea and Black Sea from the Last Glacial Maximum until ca. 12 cal kyr BP. We present new analyses (clay mineralogy, grain-size, Nd isotopes and pollen) applied to sediments from the river terraces in the lower Volga, from the middle Caspian Sea and from the western part of the Black Sea. The results show that during the last deglaciation, the Ponto-Caspian basin collected meltwater and fine-grained sediment from the southern margin of the Scandinavian Ice Sheet (SIS) via the Dniepr and Volga Rivers. It induced the deposition of characteristic red-brownish/chocolate-coloured illite-rich sediments (Red Layers in the Black Sea and Chocolate Clays in the Caspian Sea) that originated from the Baltic...
Tipo: Text
Palavras-chave: Caspian sea; Black sea; SIS deglaciation; Early Khvalynian transgression; Chocolate clays; Red layers; Clay minerals; Neodymium isotopes; Pollen; Late Pleistocene.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00345/45605/45225.pdf

Middle to Late Pleistocene vegetation and climate change in subtropical southern East Africa
Provedor de dados: 5
Autores: Castaneda, Isla S.; Caley, Thibaut; Dupont, Lydie; Kim, Jung-hyun; Malaize, Bruno; Schouten, Stefan.
In this study we investigate Pleistocene vegetation and climate change in southern East Africa by examining plant leaf waxes in a marine sediment core that receives terrestrial runoff from the Limpopo River. The plant leaf wax records are compared to a multi-proxy sea surface temperature (SST) record and pollen assemblage data from the same site. We find that Indian Ocean SST variability, driven by high-latitude obliquity, exerted a strong control on the vegetation of southern East Africa during the past 800,000 yr. Interglacial periods were characterized by relatively wetter and warmer conditions, increased contributions of C3 vegetation, and higher SST, whereas glacial periods were marked by cooler and arid conditions, increased contributions of C4...
Tipo: Text
Palavras-chave: Vegetation; Africa; N-alkane; Pollen; Subtropical Front; Mid-Brunhes.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00345/45601/45215.pdf

Palynological investigation of Holocene climatic and oceanic variability in South Africa and the southern Benguela upwelling system
Provedor de dados: 5
Autores: Zhao, Xueqin.
South Africa is very sensitive to climate change, because it is located between two atmospheric systems (subtropical and warm-temperate systems) and two oceanic systems (Benguela Current and Agulhas Current). Presently, the seasonal changes of atmospheric and oceanic systems induce a pronounced rainfall seasonality comprised of three different rainfall zones (summer rainfall zone, SRZ; year-round rainfall zone, YRZ and winter rainfall zone, WRZ) over South Africa. However, the seasonality development during the Holocene in South Africa is poorly understood and the driving forces of the climate change are debated. Therefore, this study aims to provide a detailed reconstruction of Holocene climate and vegetation variability of South Africa,...
Tipo: Text
Palavras-chave: Holocene; Marine sediments; Pollen; Microcharcoal; Organic-walled dinoflagellate cyst; Paleoenvironment; Paleoceanography; South Africa.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00493/60442/63887.pdf

Contrasting intrainterstadial climatic evolution between high and middle North Atlantic latitudes: A close-up of Greenland Interstadials 8 and 12
Provedor de dados: 5
Autores: Sanchez Goni, Maria Fernanda; Landais, Amaelle; Cacho, Isabel; Duprat, Josette; Rossignol, Linda.
Three highly resolved pollen and sea surface temperature records from the Iberian margin (36-42 degrees N) reveal the local evolution of vegetation and climate associated with the rapid climatic variability of marine isotope stage 3. The comparison of the climate at these midlatitudes with delta D and d excess from Greenland ice cores shows that the north-south climatic gradient underwent strong variations during the long Greenland Interstadials (GIs) 8 and 12. After the Northern Hemispheric rapid warming at the Greenland Stadial (GS)-GI transition, the trend during the first part of the GI is a Greenland cooling and an Iberian warming. This increase of the North Atlantic climatic gradient led to moisture transportation to Greenland from midlatitudes...
Tipo: Text
Palavras-chave: Greenland interstadial; Iberia; Dansgaard-Oeschger variability; North Atlantic; Precipitation source; Pollen.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00218/32912/31412.pdf

Modern palynological record in the Bay of Brest (NW France): Signal calibration for palaeo-reconstructions
Provedor de dados: 5
Autores: Lambert, Clement; Vidal, Muriel; Penaud, Aurelie; Combourieu-nebout, Nathalie; Lebreton, Vincent; Ragueneau, Olivier; Gregoire, Gwendoline.
Modern palynological investigations (pollen and non-pollen palynomorphs) have been carried out for the first time in the entire Bay of Brest (BB; NW France), a semi-enclosed oceanic basin flooded during the Holocene that today is exposed to both marine (North Atlantic surface waters) and fluvial (Aulne and Elorn rivers) influences. Palynological analyses were conducted on 41 surface sediments collected in several mudded bays where low-energy conditions prevail, allowing for fine particle decantation, and also on 12 moss samples considered to be pollen rain collectors taken on the periphery of the BB. Furthermore, the BB allows a direct comparison between landscapes and fossilized pollen assemblages in sediments thanks to relatively small watersheds and...
Tipo: Text
Palavras-chave: Pollen; Dinocyst; Surface sediment; Estuarine dynamics; Vegetation cover.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00382/49371/49784.pdf

Vegetation and environments since the Last Glacial Maximum in the Southern Tablelands, New South Wales
Provedor de dados: 5
Autores: Kemp, Justine; Hope, Geoff.
Regional changes in vegetation and environment in the last 16 ka have been reconstructed from Micalong Swamp and Willigobung Swamp (35 degrees S) on the western Southern Tablelands of New South Wales (NSW). Micalong Swamp lies at 980m above sea level (a.s.l.), which is close to the subalpine treeline at this latitude. Willigobung Swamp (780m a.s.l.) approaches the modern ecotone between dry and wet montane forest formations. The sites are sensitive to shifts in temperature and precipitation and are the first reported pollen records from the western montane slopes of NSW. A radiocarbon-based chronology indicates that Micalong Swamp was a swampy, gravel floodplain surrounded by alpine grassland before 16.1 ka. Subalpine woodland may have become established...
Tipo: Text
Palavras-chave: Charcoal; Fen peatlands; Late Quaternary; Pollen; South-eastern Australia; Vegetation history.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00289/40059/39334.pdf

Terrestrial plant microfossils in palaeoenvironmental studies, pollen, microcharcoal and phytolith. Towards a comprehensive understanding of vegetation, fire and climate changes over the past one million years
Provedor de dados: 5
Autores: Daniau, Anne-laure; Desprat, Stéphanie; Aleman, Julie C.; Bremond, Laurent; Davis, Basil; Fletcher, William; Marlon, Jennifer R.; Marquer, Laurent; Montade, Vincent; Morales-molino, César; Naughton, Filipa; Rius, Damien; Urrego, Dunia H.
The Earth has experienced large changes in global and regional climates over the past one million years. Understanding processes and feedbacks that control those past environmental changes is of great interest for better understanding the nature, direction and magnitude of current climate change, its effect on life, and on the physical, biological and chemical processes and ecosystem services important for human well-being. Microfossils from terrestrial plants – pollen, microcharcoal and phytoliths – preserved in terrestrial and marine sedimentary archives are particularly useful tools to document changes in vegetation, fire and land climate. They are well-preserved in a variety of depositional environments and provide quantitative reconstructions of past...
Tipo: Text
Palavras-chave: Pollen; Microcharcoal; Phytolith; Terrestrial and marine sedimentary archives; Vegetation; Fire; Middle Pleistocene; Last glacial period; Holocene.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59705/83610.pdf

Pollen Evolution in Yams (Dioscorea: Dioscoreaceae)
Provedor de dados: 16
Autores: Schols, P.; Wilkin, P.; Furness, C.; Huysmans, S.; Smets, E.
Pollen character evolution in yams (Dioscorea: Dioscoreaceae) was investigated in relation to the phylogeny obtained from a recent combined analysis of rbcL and matK gene sequences. The following characters were evaluated: pollen size, aperture number, sexine ornamentation, perforation density, and orbicule presence or absence. Continuous characters were coded using the gap weighting method. Each character was optimized using MacClade onto a tree selected at random from analyses based on molecular data of Wilkin et al. The results indicate that in Dioscorea pollen size decreases in the more derived clades. The latter observation may be related to the evolution of annually replaced tubers. Aperture number increases from one in the monosulcate Stenophora...
Tipo: Article / Letter to the editor
Palavras-chave: Dioscorea; Dioscoreaceae; Pollen; Evolution; Phylogeny.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/407309

The manifold characters of orbicules: structural diversity, systematic significance, and vectors for allergens
Provedor de dados: 16
Autores: Vinckier, S.; Cadot, P.; Smets, E.
In the anthers of flowering plants, gymnosperms, and seed ferns, tiny (¡1 mm) granules might occur on the radial and innermost tangential wall of secretory tapetum cells. These sporopollenin granules develop simultaneously with the pollen exine and are called orbicules or Ubisch bodies. The present paper focuses on two quite different topics associated with orbicules. The morphological and ultrastructural diversity of orbicules in the order Gentianales is summarized, and it is demonstrated that orbicules are a plesiomorphic feature in the order. Furthermore, orbicule characters seemed to be correlated with evolutionary trends in pollen dispersal unit and tapetum type features. In the second part, we report on our investigation of Corylus avellana L....
Tipo: Article / Letter to the editor
Palavras-chave: Orbicules; Morphology; Diversity; Gentianales; Plesiomorphic feature; Pollen; Corylus avellana L.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/407306

Type specimens of birds in the National Museum of Natural History, Leiden. Part 2. Passerines: Eurylaimidae – Eopsaltriidae (Peters’s sequence).
Provedor de dados: 16
Autores: Dekker, R.W.R.J.
The type specimens present in the National Museum of Natural History, Leiden, are listed for the Passerine families Eurylaimidae up to and including the Eopsaltriidae (following the sequence in Peters’s Check-list of the Birds of the World).
Tipo: Article / Letter to the editor
Palavras-chave: Aves; Passerines; Types; Nationaal Natuurhistorisch Museum; Rijksmuseum van Natuurlijke Historie; Bernstein; Bonaparte; Büttikofer; Finsch; Forsten; Hoedt; Junge; Kuhl; Mees; Müller; Pel; Pollen; Schlegel; Schwaner; Temminck; Van Dam; Van Hasselt; Van Oort; Von Rosenberg; Von Siebold; 42.83.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/214679

Palynotaxonomy of the genus Gladiopappus (Dicomeae, Asteraceae) with special emphasis on the exine ultrastructure and mesoapertures
Provedor de dados: 16
Autores: Pereira Coutinho, A.; Sá da Bandeira, D.; Currais, L.; Soukiazes, E.; Ortiz, S.
The pollen morphology of Gladiopappus vernonioides was studied with transmission (TEM) and scanning (SEM) electron microscopy and with light microscopy (LM). An Anthemoid pattern of exine ultrastructure was found. The pollen morphology of Gladiopappus supports the inclusion of this genus in the tribe Dicomeae and subtribe Dicominae but not in the Mutisieae s.str. The apertural system of G. vernonioides includes a mesoaperture that intersects the foot layer and the upper layer of the endexine, a condition already pointed out for several tribes of Asteroideae (Helenieae, Gnaphaliinae, Heliantheae, Inuleae, Senecioneae) and Carduoideae (Cardueae, Dicomeae). It is suggested that the existence of an intermediate aperture could characterize the apertural system...
Tipo: Article / Letter to the editor
Palavras-chave: Dicomeae; Exine; LM; Mutisieae; Pollen; SEM; TEM.
Ano: 2018
URL: http://www.repository.naturalis.nl/record/655821

Orbicules do not significantly contribute to the allergenic micro-aerosol emitted from birch trees
Provedor de dados: 16
Autores: Vinckier, S.; Cadot, P.; Grote, M.; Ceuppens, J.L.; Smets, E.
Tipo: Article / Letter to the editor
Palavras-chave: Betula verrucosa 1; Betula verrucosa 7; Immunogold electron microscopy; Pollen; Ubisch bodies; 42.40.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/422330

Pollen morphological variation in Vanguerieae (Ixoroideae - Rubiaceae)
Provedor de dados: 16
Autores: Lens, F.; Jansen, S.; Huysmans, S.; Robbrecht, E.; Smets, E.
The Vanguerieae is a large tribe of the subfamily Ixoroideae (Rubiaceae) and consists of about 500 species in 27 genera. This study gives a detailed pollen morphological description of 30 species from 16 genera, based on light microscopy and scanning electron microscopy. The Vanguerieae are considered to be stenopalynous, although there is some evidence to question this. First, there is a difference in sexine types that clearly de® nes Keetia and Psydrax ( both reticulate) , and Canthium and Vanguerieae (both perforate with very small perforations) from the other Vanguerieae investigated. Second, pollen grains corroborate the subgeneric delimitations of Canthium sensu Bridson. Pollen morphologically the tribe is characterised by ( 1) the shape of the...
Tipo: Article / Letter to the editor
Palavras-chave: Vanguereae; Ixoroideae; Rubiaceae; Pollen; Morphological variation; Stenopalynous; 42.58.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/423771

Palynological Variation in Balsaminoid Ericales. II. Balsaminaceae, Tetrameristaceae, Pellicieraceae and General Conclusions
Provedor de dados: 16
Autores: Janssens, S.; Lens, F.; Dressler, S.; Geuten, K.; Smets, E.; Vinckier, S.
Background and Aims The objective of this study is to examine the palynological diversity of Balsaminaceae (two genera/61000 species), Tetrameristaceae (two genera/two species) and Pellicieraceae (one genus/one species). The diversity found will be used to infer the systematic value of pollen features within the balsaminoid clade.  Methods Pollen morphology and ultrastructure of 29 species, representing all families of the balsaminoid clade except Marcgraviaceae, are investigated by means of light microscopy, scanning electron microscopy and transmission electron microscopy.  Key Results Balsaminaceae pollen is small to medium sized with three to four apertures, which can be either colpate or porate, and a sexine sculpturing varying from coarsely...
Tipo: Article / Letter to the editor
Palavras-chave: Balsaminaceae; Ericales; Orbicules; Pellicieraceae; Pollen; SEM; TEM; Tetrameristaceae.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/407278

Khmeriosicyos, a new monotypic genus of Cucurbitaceae from Cambodia
Provedor de dados: 16
Autores: Wilde, W.J.J.O. de; Duyfjes, B.E.E.; Ham, R.W.J.M. van der.
A new monotypic genus from Cambodia is described. The genus is defined by a unique combination of characters and has distinct pollen features. The only species is Khmeriosicyos harmandii W.J. de Wilde &amp; Duyfjes.
Tipo: Article / Letter to the editor
Palavras-chave: Cucurbitaceae; Khmeriosicyos; New genus; Pollen; SE Asia.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/525002

Thunbergia impatienoides (Acanthaceae), a new species from Thailand
Provedor de dados: 16
Autores: Suwanphakdee, C.; Vajrodaya, S.
A new species, Thunbergia impatienoides, was discovered from Thailand and is here described. Detailed descriptions including pollen and seed morphologies, distribution, ecology and illustration are provided.
Tipo: Article / Letter to the editor
Palavras-chave: New species; Pollen; Thailand; Thunbergia.
Ano: 2018
URL: http://www.repository.naturalis.nl/record/649731

Pollen of Southeast Asian Alchornea (Euphorbiaceae), with an overview of the pollen fossil record
Provedor de dados: 16
Autores: Bulalacao, L.J.; Ham, R.W.J.M. van der.
In order to evaluate pollen morphological descriptions of Alchornea in the literature, which are almost completely based on African and American species, the pollen of eight Southeast Asian species of Alchornea was investigated, using light and scanning electron microscopy. Very little variation appeared to be present in the Asian material. Slightly deviating from the scabrate ornamentation type are A. kelungensis (psilate) and A. rugosa (striate-rugulate). The scabrate type is also found in A. castaneaefolia (Brazil), A. hirtella (Liberia) and A. obovata (Colombia). The operculate Alchornea pollen type, which can be easily recognised using light microscopy, seems to represent a diagnostic character for the tribe Alchornieae (pollen of Bossera unknown)....
Tipo: Article / Letter to the editor
Palavras-chave: Alchornea; Euphorbiaceae; Fossil record; Pollen; SE Asia.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/525434

The uses of pollen and its implication for Entomology
Provedor de dados: 82
Autores: JONES,GRETCHEN D.; JONES,STANLEY D.
Palynology is the study of pollen grains produced by seed plants (angiosperms and gymnosperms) and spores (pteridophytes, bryophytes, algae and fungi). It represents the land flora and can be use in many different disciplines. Pollen is distinctive, does not easily decay and is a natural marker. Pollen can be used to determine pollination mechanisms, foraging resources, migration routes and source zones of insects and other pollinators. It provides a means for paleoenvironmental analyses of terrestrial rocks and is of interest to geologists. Pollen also aids in the correlation of terrestrial with marine successions and is used to determine environmental and ecological changes. Recently, palynology is used in forensics. This manuscript introduces the ideas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Entomopalynology; Forensics; Aerobiology.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000300001

Alternative food sources and overwintering feeding behavior of the boll weevil, Anthonomus grandis boheman (coleoptera: curculionidae) underthe tropical conditions of central Brazil
Provedor de dados: 82
Autores: Ribeiro,Paulina de A; Sujii,Edison R; Diniz,Ivone R; Medeiros,Maria A de; Salgado-Labouriau,Maria L; Branco,Marina C; Pires,Carmen S S; Fontes,Eliana M G.
The boll weevil causes serious damage to the cotton crop in South America. Several studies have been published on this pest, but its phenology and behavior under the tropical conditions prevailing in Brazil are not well-known. In this study the feeding behavior and main food sources of adult boll weevils throughout the year in Central Brazil was investigated. The digestive tract contents of insects captured in pheromone traps in two cotton fields and two areas of native vegetation (gallery forest and cerrado sensu stricto) were analyzed. The insect was captured all through the year only in the cerrado. It fed on pollen of 19 different plant families, on Pteridophyta and fungi spores and algae cysts. Simpson Index test showed that the cerrado provided...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Cerrado; Cotton; Gallery forest; Host plant.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000100005

Saprophytic fungus collection by africanized bees in Brazil
Provedor de dados: 82
Autores: Modro,Anna F H; Silva,Izabel C; Message,Dejair; Luz,Cynthia F P.
Cladosporium sp. collection by bees (Apis mellifera L.) was observed in Brazil at an apiary located in Minas Gerais, during November10-23, 2005, characterized by high air relative humidity and low availability of food resources (pollen and nectar).The nutritional composition of the fungi pellets presented high protein value, ethereal extract and organic matter.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apis mellifera; Cladosporium sp.; Pollen; Nutritional composition.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000300022

Transformants through Pollination of Mature Maize(Zea mays L.) Pollen Delivered bar Gene by Particle Gun
Provedor de dados: 19
Autores: Horikawa, Yoh; Yoshizumi, Takeshi; Kakuta, Hideo; 堀川, 洋; 吉積, 毅; 角田, 英男.
日本草地学会誌　Grassland science 43(2) p.117-123(1997)より転載
Palavras-chave: Magnetite; Particle gun; Pollen; Transformation; Zea mays L.; 花粉; 形質転換; 磁性体; トウモロコシ; パーティクルガン.
Ano: 1997
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/744

Magnetic particle-mediated gene transfer and magnetic selection of cells
Provedor de dados: 19
Autores: 角田, 英男; 堀川, 洋.
微粒子銃装置（パーティクルガン）を用いて，磁性微粒子に遺伝子を担持させてタバコ（Nicotiana rustica）培養細胞やトウモロコシ（Zea mays L.），アスパラガス（Asparagus officinalis L.）およびカボチャ（Cucurbita pepo L.）の花粉に遺伝子を導入し磁力選抜を行った。磁性微粒子として、酸化鉄（マグネタイト，フェライト），鉄，ニッケル，鉄酸化物・金複合微粒子および金微粒子を用いた。一過的遺伝子の導入発現効率は，CaMV 35S プロモーターとNOS ターミネーターを組み込んだGUS 遺伝子を含むプラスミドｐBI221 用いて評価した。金微粒子を用いて遺伝子導入した時の一過的発現効率は低かったが，磁性微粒子を用いて磁気による細胞濃縮と磁力選抜を行うことによって遺伝子発現効率は顕著に増加した。例えば，トウモロコシ花粉へ磁性を有する酸化鉄微粒子（マグネタイト）を用いて撃ちこんだ時，GUS 遺伝子発現効率は8.5×10-4から2.1×10-2へと25 倍の向上があった。また，同様にカボチャ花粉の場合は6×10-4から2.3×10-2へと約38 倍の効果があったが、アスパラガス花粉についてはあまり大きな効果は認められなかった。これらの結果をもとに，除草剤biaraphos に抵抗性を有するbar 遺伝子を含むプラスミドpARK22...
Palavras-chave: パーティクルガン; 磁性微粒子; 磁力選抜; 花粉; 形質転換; Particle gun; Magnetic particles; Magnetic selection; Pollen; Transformation.
Ano: 2007
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1577

Foraging pattern and harvesting of resources of subterranean stingless bee Geotrigona subterranea (Friese, 1901) (Hymenoptera: Apidae: Meliponini)
Provedor de dados: 84
Autores: Barbosa,Fernando Mendes; Campos,Lúcio Antônio de Oliveira; Paixão,Joana Fidelis da; Alves,Rogério Marcos de Oliveira.
ABSTRACT Flight activity of bees is influenced both by environmental factors and by internal condition of the colonies. Information about external activity of bees is very important, because it provides data of the species biology, supplying subsidies for the use of these insects in the pollination of crops. The present work aim to evaluate the flight activity of Geotrigona subterranea (Friese, 1901) (Hymenoptera: Apidae) in natural environment. This study was performed on the Instituto Federal do Norte de Minas Gerais, in the municipality Januária, Minas Gerais State. Two natural nests were observed. The activities of bees of the colonies were recorded three days each month, during the period of December 2011 to November 2012, totaling 924 observations....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Foraging behavior; Meliponini; Pollen; Resin; Detritus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492016001200151

Pollen morphology of Senecio bergii (Asteraceae), with special attention to the mesoaperture
Provedor de dados: 85
Autores: Montes,B; Murray,MG.
Palynological studies contribute to understanding the taxonomy, phylogeny and ecology of the Asteraceae and other families. In this study, pollen morphology and ultrastructure of the exine of Senecio bergii Hieron. were studied using light, scanning and transmission electron microscopy. The pollen of this species is prolate-spheroidal, it has a Senecioid pattern on the exine and an apertural system composed of three apertures (ecto-, meso- and endoapertures). This pollen type is defined as tricolpororate due to the triple apertural system. This is the first description of the ultra-structure of the apertural system of the pollen of Argentine species of Senecio. The presence of mesoapertures and the description of the ultrastructure of the pollen of Senecio...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Senecio; Pollen; Exine; Mesoaperture; Ultrastructure.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100027

Morphology, Anatomy, Palynology and Seed Micromorphology of Turkish Endemic Verbascum exuberans Hub.-Mor. (Scrophulariaceae)
Provedor de dados: 87
Autores: AKTAS,K.; ÖZDEMIR,C.; ÖZDEMIR,B.
ABSTRACT: Verbascum L. is the largest genus of the family Scrophulariceae and includes several species are of medicinal importance. The high morphological diversity among the species of the genus Verbascum causes problems in the delimitation of the species. In this study, morphological, anatomical, palynological and seed properties of Verbascum exuberans were investigated. It is a local endemic restricted to the provinces of Manisa and Izmir in West Anatolia. In the root cross-section, the xylem elements occupy a considerable area. The upper part of the epidermis cells in the stem cross-section is covered a distinct cuticle layer. The main vein of the leaf is shapped as bicollateral bundle. Idioblasts were not observed in the epidermis of the leaves of V....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf; Pollen; Root; Stem; Mullein.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100203

Estudo polínico em plantas de restinga do Estado do Rio de Janeiro: Clusiaceae Lindl.
Provedor de dados: 88
Autores: GONÇALVES-ESTEVES,VANIA; MENDONÇA,CLAUDIA BARBIERI FERREIRA.
Este trabalho trata da palinologia de oito espécies de Clusiaceae: Calophyllum brasiliense Cambess., Clusia criuva Cambess., C. hilariana Schltdl., C. lanceolata Cambess., C. parviflora (Sald.) Engl., Garcinia brasiliensis Mart., Kielmeyera membranacea Casar. e Symphonia globulifera L.f. Os grãos de pólen foram acetolisados, medidos, descritos e ilustrados sob microscopia de luz e microscopia eletrônica de varredura (MEV). Foram estudadas as principais características dos grãos de pólen como forma, tamanho, constituição da exina e aberturas. Constatou-se que os grãos de pólen foram pequenos, médios ou grandes, suboblatos, oblato-esferoidais, prolato-esferoidais ou subprolatos, isopolares, porados (3-6) ou 3-colporados, área polar muito pequena, pequena ou...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Palynology; Clusiaceae; Restinga; Pollen.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000500007

Pollen morphology of species of Hortia (Rutaceae)
Provedor de dados: 88
Autores: Groppo,Milton; Cruz-Barros,Maria Amélia Vitorino da; Correa,Angela Maria da Silva.
A palinological study covering all 10 species of the Neotropical genus Hortia Vand. (Rutaceae) was conducted. Pollen grains were collected from herbarium exsiccates, acetolysed and mounted in glycerine jelly on glass slides. The grains were studied under light and scanning electron microscopy, including measurements of polar and equatorial diameters, shape of the grains, number and shape of apertures, and thickness of the exine. The results demonstrated that the genus is stenopalynous, with pollen grains in monads, subprolate to prolate, 3-colporate, with very thick exine and a psilate-perforate pattern of ornamentation. Pollen grains of all species revealed a great similarity, with few variations in the pattern of ornamentation of exine, number and form...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hortia; Pollen; Rutaceae.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000100003

Palinotaxonomia de espécies brasileiras de Salacia L. (Hippocrateaceae)
Provedor de dados: 88
Autores: GONÇALVES-ESTEVES,VANIA; MELHEM,THEREZINHA SANT’ANNA.
O estudo palinotaxonômico de Salacia L. teve como objetivo contribuir para a melhor caracterização, circunscrição e delimitação deste gênero. Os grãos de pólen de 21 espécies de Salacia foram acetolisados, medidos, descritos e ilustrados sob microscopia de luz e microscopia eletrônica de varredura (MEV). A análise sob MEV foi utilizada visando a elucidação de dúvidas sobre a ornamentação da exina. Constatou-se que os grãos de pólen são predominantemente de tamanho médio, reticulados a microrreticulados, 3-colporados, geralmente com uma característica área apertural proeminente. Salacia é um gênero estenopolínico. Entretanto, o pólen permitiu a confecção da chave polínica e a separação de diferentes espécies ou grupo de espécies de Salacia com base nos...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Palynotaxonomy; Salacia; Hippocrateaceae; Pollen.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000400009

Specialized diet of the solitary bee Epicharis rustica (Apoidea, Centridini): importance of the tree Byrsonima sericea
Provedor de dados: 92
Autores: Carvalho,Fabrício L.; Raw,Anthony.
ABSTRACT Collection of pollen was verified in 248 samples of the material on the hind tibial scopae of the solitary bee, Epicharis rustica (Olivier, 1879) captured on their return to the nest. Of the total, 54% (133) of the samples had material on the scopae, 48 of then had only oil and 85 (64%) had both oil and pollen. For seven weeks, almost all (91%) of the 85,000 the pollen grains were of the tree, Byrsonima sericea DC. In the latter weeks the proportion of this species decreased. Like several other members of the genus, E. rustica is univoltine, oligolectic and nests in aggregations.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Oil flowers; Oligolectic species; Pollen; Specialist bees.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262017000100099

Analysis of digestive tract content of the larvae of Polybia scutellaris (White) (Hymenoptera, Vespidae)
Provedor de dados: 92
Autores: Corujo,Victoria Lilian Fernández; Basilio,Mabel Alicia; Galati,Beatriz Gloria.
Polybia scutellaris (White, 1841) is a social wasp of biological interest for its role as pollinator and maybe as biological control agent of sanitary and agricultural pests. This study examines the digestive tract contents of the larvae of P. scutellaris from four nests in Magdalena (Buenos Aires province, Argentina). Contents included both animal (arthropod parts) and plant (pollen, leaf and fruit epidermis) parts. The pollen content analysis showed that the wasps visited 19 different taxa of plants during the last active period of the colony before the nests had been collected. The range of sources used by P. scutellaris allows us characterizing the species as a generalist flower visitor. Wasps visited both native and exotic plants located nearby the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epidermal tissues; Generalist visitor; Pollen; Social wasp.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000200015

Spores of Paenibacillus larvae, Ascosphaera apis, Nosema ceranae and Nosema apis in bee products supervised by the Brazilian Federal Inspection Service
Provedor de dados: 92
Autores: Teixeira,Érica Weinstein; Guimarães-Cestaro,Lubiane; Alves,Maria Luisa Teles Marques Florêncio; Message,Dejair; Martins,Marta Fonseca; Luz,Cynthia Fernandes Pinto da; Serrão,José Eduardo.
ABSTRACT Due to their ecological and economic importance, honey bees have attracted much scientific attention, which has intensified due to the recent population decline of these insects in the several parts of the world. Among the factors related to these patterns, infection by pathogens are the most relevant, mainly because of the easy dissemination of these microorganisms. Although no zoonotic diseases are associated with these insects, the presence of infectious agents in bee products should still be considered because they play a role as disease dispersers, increasing the risk to animal health. Because of the possibility of dispersion of pathogens via bee products, this work aimed to identify the presence of spores of the pathogens Paenibacillus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apis mellifera; Honey; Multiplex PCR; Pollen; Royal jelly.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262018000300188

STIGMATIC RECEPTIVITY AND POLLEN VIABILITY OF Theobroma subincanum Mart.:FRUIT SPECIES FROM THE AMAZON REGION
Provedor de dados: 94
Autores: ARENAS-DE-SOUZA,MAICON DOUGLAS; ROSSI,ANA APARECIDA BANDINI; VARELLA,TATIANE LEMOS; SILVEIRA,GREICIELE FARIAS DA; SOUZA,SÉRGIO ALESSANDRO MACHADO.
ABSTRACT  Theobroma subincanum (cupuí) is a fruit species native to the Amazon region. Fruits are enjoyed by local people and consumed both as fresh fruit such as juice, nectar or soft drinks. Reproductive biology studies provide contributions to conservation strategies and plant improvement. The present study aimed to analyze the stigmatic receptivity and pollen viability of T. subincanum. This study was developed in a forest fragment located in the urban perimeter of the municipality of Alta Floresta, MT. In the flowering period, flower buds or flowers were collected in seven different times, as follows: 10 pm, 02 am, 06 am, 10 am, 2 pm, 6 pm, and 10 pm. Pollen viability was estimated by reactive Alexander (1969) and stigmatic receptivity using 3%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cupui; Pollen; Fertilization; Fructification; Floral biology.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000400201

EVALUATION OF FLORAL CHARACTERISTICS OF MELON HYBRIDS (Cucumis melo L.) IN POLLINATOR ATTRACTIVENESS
Provedor de dados: 94
Autores: KIILL,LÚCIA HELENA PIEDADE; FEITOZA,EDSÂNGELA DE ARAÚJO; SIQUEIRA,KÁTIA MARIA MEDEIROS DE; RIBEIRO,MÁRCIA DE FÁTIMA; SILVA,EVA MÔNICA SARMENTO DA.
ABSTRACT  Floral morphology and biology are important characteristics for plant-pollinator interactions and may influence the behavior of these agents. This study aimed to determine which floral attributes of different melon hybrids influence this interaction and, consequently, their attractiveness in simultaneous crops. The study was conducted in the region of Petrolina, State of Pernambuco (PE)/Juazeiro, State of Bahia (BA) and Mossoró, State of Rio Grande do Norte (RN), in areas with the following melon hybrids: Yellow type, Piel de Sapo, Cantaloupe and Galia. For studies on floral morphology and biology, hermaphrodites and male flowers of each hybrid were analyzed for their size and nectar chamber size, pollen and nectar production, anthesis time and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthesis; Cucurbitaceae; Nectar; Pollen; Floral resources.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200604

Pollination and seed dispersal by lizards: a review
Provedor de dados: 97
Autores: GODÍNEZ-ALVAREZ,HÉCTOR.
This paper reviews the ecological literature published during the last 15 years on pollination and seed dispersal by lizards, in order to determine the possible effects of these animals on plant reproduction. This review is only limited to these years because articles on plant-lizard interactions during this period have used more rigorous experimental approaches than those made previously. All compiled data were analyzed considering the conceptual framework provided by the quantity and quality components of pollination and seed dispersal (i.e., effectiveness), since this information is essential to have an idea of the relative contribution of animals to plant fitness. Results showed that 34 species of lizards feed on nectar and fruits of plants. While...
Tipo: Journal article
Palavras-chave: Effectiveness; Fruits; Mutualism; Nectar; Pollen.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2004000300015

Late Holocene vegetation dynamics and lake geochemistry at Laguna Miranda, XI Region, Chile
Provedor de dados: 97
Autores: HABERLE,S. G.; SZEICZ,J. M.; BENNETT,K. D.
Palynological and geochemical analysis of late Holocene lake sediments and dendrochronological analysis of Pilgerodendron in a volcanically active region of southern Chile reveal the long-term impact of a series of tephra fall events and tectonic activity on lake sedimentation and local vegetation. An upper 0,75 m core overlaps with a 4,35 m long Livingstone piston core to give a 4,60 m long sediment record, extending back to 4800 yr BP. Geochemical data shows the shift from allogenic dominance to authigenic and biogenic dominance as waterlogged soils developed within the catchment. This is presumed to have occurred under the influence of continued addition of nutrients to the catchment from tephra deposition and the associated high sedimentation rates....
Tipo: Journal article
Palavras-chave: Hudson Volcano; Tephra; Pollen; Geochemistry; Dendrochronology.
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000400010

Pollen harvest features of the Central Amazonian bee Scaptotrigona fulvicutis Moure 1964 (Apidae: Meliponinae), in Brazil
Provedor de dados: 39
Autores: Marques-Souza,Antonio Carlos; Absy,Maria Lúcia; Kerr,Warwick Estevam.
Over a twelve-month period, pollen loads transported by Scaptotrigona fulvicutis Moure 1964 were collected from the workers corbiculae right after the hive entrance closure in an area of old secondary forest mixed with some exotic fruit trees and ornamentals. Once the pollen grains were identified, their monthly frequency in the samples and grouping by botanical family established that Mimosaceae, Myrtaceae and Sapindaceae were the most frequently visited. The workers harvested the pollen from 97 plant species distributed in 73 genera and 36 families, mostly: Stryphnodendron guianense (Aubl.) Benth. in April (57,37%) and Schefflera morototoni (Aubl.) Frodin in May (54,73%). The harvested pollen types abundance matrix showed that there was little species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Stingless bee; Apidae; Meliponinae; Scaptotrigona fulvicutis; Amazônia.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000100002

Hippeastrum species in areas of restinga in the state of Rio de Janeiro, Brazil: pollen characters
Provedor de dados: 39
Autores: Candido,Renata Suzano; Fourny,Ana Carolina da Silva; Gonçalves-Esteves,Vania; Lopes,Rosana Conrado.
The order Asparagales comprises 14 families, five of which occur in Brazil. Amaryllidaceae is a family of economic relevance and includes numerous ornamental genera. The genus Hippeastrum is widely distributed in Brazil and comprises 34 species, 11 of which occur in areas of restinga (coastal woodland) and Atlantic Forest in the state of Rio de Janeiro. The morphology of Hippeastrum has not been extensively studied in Brazil, where only a few systematic floristic surveys have been carried out with native species. In field studies and reviews of herbarium collections, we identified five Hippeastrum species occurring in areas of restinga in the state of Rio de Janeiro. The five species identified could be distinguished according to the following...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amaryllidaceae; Asparagales; Conservation; Pollen.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400003

Pollen morphology of Brazilian species of Verbesina L. (Heliantheae - Asteraceae)
Provedor de dados: 39
Autores: Moreira,Giselle Lopes; Cavalcanti,Taciana Barbosa; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vânia.
Abstract There are nine species of the plant genus Verbesina in Brazil, which are distributed in the Northeast, Center-West, Southeast and South regions of the country. The objective of the present study was to describe the pollinic morphology of eight of these species to better characterize them and evaluate potential species-level taxonomic characters. Acetolysed pollen material was measured within seven days under light microscopy, while non-acetolyzsed pollen grains were used for scanning electronic microscopy. The pollen grains were found to be oblate-spheroidal, medium-sized, isopolar, monads that are 3-colporate with a subtriangular amb, a small polar area, a long colpus, a lalongate endoaperture, a caveate exine and an echinate sexine. Although the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Compositae; Heliantheae; Morphology; Pollen; Verbesina.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100128

Late Holocene paleoenvironments of the floodplain of the Solimões River, Central Amazonia, based on the palynological record of Lake Cabaliana
Provedor de dados: 39
Autores: Sá,Natália de Paula; Absy,Maria Lúcia; Soares,Emílio Alberto Amaral.
ABSTRACT The core PD-67 of 160 cm depth was collected from the delta of Lake Cabaliana situated on the Solimões River. Seventeen samples were removed for palynological and sedimentological analysis and three for radiocarbon analysis. Two dry periods, both in the Late Holocene, were observed (2800-2550 cal yr BP, 1450-550 cal yr BP) separated by a wetter phase (2550-1450 cal yr BP). In 2800-2550 cal yr BP, varzea forests of Alchornea, Symmeria, Cecropia, Alternanthera and Asteraceae were predominant. Beginning in 2,550-1450 cal yr BP, the varzea was characterized by pioneer elements, such as Cassia, Laetia, Mabea, Symmeria and Cecropia, and by the expansion of Poaceae, Cyperaceae, Sagittaria, Montrichardia and Asteraceae. In 1450-550 cal yr BP the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Pollen; Quaternary; Rainfall; Terra firme forest.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300473

Pollen analysis of the post-emergence residue of Melipona (Melikerria) interrupta Latreille (Hymenoptera: Apidae) bred in the central Amazon region
Provedor de dados: 39
Autores: Ferreira,Marcos Gonçalves; Absy,Maria Lúcia.
We applied an "adapted" protocol for collecting and processing pollen grains in the pollen analysis of the post-emergence residue of Melipona (Melikerria) interrupta Latreille. The study was conducted at the Sant'Ana honey farm, located on the banks of the Solimões River, in the municipality of Manacapuru, in the state of Amazonas, Brazil, where a colony was monitored in October and November 2010. From that colony, 10 samples of post-emergence residue were collected. Unlike in the acetolysis method, there was no need to expose pollen grains to an acidic medium, because pollen loses its content during the larval digestive process. We identified 32 pollen types, from 19 botanical families, plus three undetermined pollen types. The most representative family...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stingless bees; Palynology; Pollen; Floral resources.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400009

Reconstruction of the Late Pleistocene to Late Holocene vegetation transition using packrat midden and pollen evidence from the Central Mojave Desert
Provedor de dados: 39
Autores: Balmaki,Behnaz; Wigand,Peter E.
ABSTRACT The Mojave Desert of the American West is characterized by plant species that reflect a unique mixture of winter precipitation and summer monsoon climate. Currently, the Mojave Desert experiences a strong summer monsoonal pattern with weak winter precipitation. Data from pollen and packrat midden analyses have revealed a history of Mojave Desert vegetation during the transition from the late Pleistocene to late Holocene (~17500 Cal. years B.P. to ~ 1200 Cal. years B.P.) that highlight a summer dominated monsoonal pattern, similar to those in the greater American Southwest. We compare pollen data from a lava tube in the Cima volcanic field, located in south-central region of the Mojave Desert, with plant macrofossil data from several woodrat midden...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Late Pleistocene; Late Holocene; Mojave Desert; Pollen; Summer monsoon; Woodrat midden analysis.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000300539

Pollen morphology and study of the visitors (Hymenoptera, Apidae) of Solanum stramoniifolium Jacq. (Solanaceae) in Central Amazon
Provedor de dados: 39
Autores: Silva,Alexandre Coletto da; Kinupp,Valdely Ferreira; Absy,Maria Lucia; Kerr,Warwick Estevam.
The Solanaceae family has a wide distribution, mainly in the tropical and subtropical areas of South America. Solanum L. is one of the most important genera of the family with approximately 1,200 species. The objective of this work was to study the floral biology, pollen morphology as well as to investigate the bee visitors of S. stramoniifolium. Preliminary data indicate the presence of one species of stinging bee and four species of stingless bees as visitors to S. stramoniifolium. The pollen of S. stramoniifolium is tricolporate and psilate or without ornamentation. In a word, S. stramoniifolium constitutes a potential source of pollen for different species of bees with and without sting, providing an interesting field for germination studies,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum stramoniifolium; Bees; Pollen; Pollination; Acetolysis.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062004000300022

Comportamento forrageiro da abelha africanizada Apis mellifera L. no decorrer do ano - doi: 10.4025/actascianimsci.v33i2.9252
Provedor de dados: 2
Autores: Souza, Darclet Terezinha Malerbo; Centro Universitário Moura Lacerda; Silva, Flávio Augusto Santos; Centro Universitário Moura Lacerda.
O objetivo deste experimento foi estudar o comportamento forrageiro das abelhas africanizadas Apis mellifera, no decorrer do ano. As coletas foram realizadas na área experimental do Centro Universitário Moura Lacerda, Ribeirão Preto, Estado de São Paulo. Uma vez por mês, durante 12 meses, era realizada uma avaliação da atividade de coleta dessas abelhas anotando-se, das 7h às 18h, 10 min. em cada horário, o número de abelhas que entrava na colmeia carregando pólen ou néctar, com cinco repetições por mês. As abelhas A. mellifera coletaram néctar durante todo o dia aumentando sua frequência até às 12h, e para pólen, essas abelhas preferiram o período da manhã, até as 11h. Concluiu-se que não houve diferença significativa tanto para coleta de néctar quanto...
Tipo: Pesquisa experimental
Palavras-chave: 5.04.01.00-9 Apis mellifera; Fatores climáticos; Forrageamento; Néctar; Pólen Ecologia dos Animais Domésticos e Etologia Apis mellifera; Climatic factors; Foraging; Nectar; Pollen.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/9252

Frequency and foraging behavior of Apis mellifera in two melon hybrids in Juazeiro, state of Bahia, Brazil
Provedor de dados: 42
Autores: KIILL,LÚCIA H.P.; SIQUEIRA,KÁTIA M.M.; MÁRCIA S.,COELHO; SILVA,TAMIRES A.; GAMA,DIEGO R.S.; ARAÚJO,DIEGO C.S.; PEREIRA NETO,JOAQUIM.
The study was carried out to verify if there are differences in foraging frequency and behavior of Apis mellifera in two melon hybrids (10:00 – ‘Yellow melon’ and Sancho -‘Piel de Sapo’) in the municipality of Juazeiro, state of Bahia, Brazil. The frequency, behavior of visitors and the floral resource foraged were registered from 5:00 am to 6:00 pm. There was a significant difference in the frequency of visits when comparing hydrids (F = 103.74, p &lt;0.0001), floral type (F = 47.25, p &lt;0.0001) and resource foraged (F = 239.14, p &lt;0.0001). The flowers of Sancho were more attractive to A. mellifera when compared with hybrid 10:00, which may be correlated to the morphology and floral resources available. This could be solved with scaled planting,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo L; Melon hybrids; Nectar; Pollen.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000402049

Pollen record and paleoenvironment of a 4210 years B.P.old sediment in the Bay of Guanabara, Rio de Janeiro, Brazil
Provedor de dados: 42
Autores: Barth,Ortrud M.; Barreto,Cíntia F.; Coelho,Luciane G.; Luz,Cynthia F.P.
Pollen analysis of a sediment sample obtained at 222 cm from the top of a drilling core collected in the Bay of Guanabara, Rio de Janeiro, was used as a tool to obtain more knowledge about pre-historical human living and environment. 14C datation revealed the age of 4210 years B.P. Most frequent pollen grains came from plants like Alchornea (Euphorbiaceae), Celtis (Ulmaceae), Lecythidaceae, Meliaceae, Ochnaceae and spores from forest Pteridophyta. Palynology and environmental studies revealed that agricultural activities could not be detected. The dense tropical rain forest was the dominant vegetation occurring in this region.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Paleoenvironment; Guanabara Bay; Rio de Janeiro; 4210 BP.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000300009

Paleoenvironment interpretation of a 1760 years B.P. old sediment in a mangrove area of the Bay of Guanabara, using pollen analysis
Provedor de dados: 42
Autores: Barth,Ortrud M.; São-Thiago,Luiz E.U.; Barros,Marcia A.
A sediment sample was obtained at 122 cm from the top of a drilling core in the Guapimirim mangrove, Bay of Guanabara, and analyzed using pollen analysis. This muddy core reached a sandy ground at 133 cm. 14C datation got the age of 1760 ± 50 years B.P. The most frequent pollen grains were mangrove species of Rhizophora mangle, Laguncularia racemosa and Avicennia schaueriana. "Restinga" and tropical rain forest vegetation was recognized behind the mangrove. After the last sea transgression at 2500 years B.P., the water level lowered to its actual size, allowing the installation of this mangrove.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Paleoenvironment; Mangrove; Bay of Guanabara; Rio de Janeiro; 1760 B.P.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000200004

Palynological analysis of a sediment core obtained in Guanabara Bay, Rio de Janeiro, Brazil
Provedor de dados: 42
Autores: Barreto,Cintia F.; Luz,Cynthia F.P. da; Baptista-Neto,José A.; Vilela,Claudia G.; Barth,Ortrud M.
The sediment of a core collected about 2 km north of Paquetá Island, Guanabara Bay, was submitted to pollen analysis, in order to recognize the dynamics of the regional vegetation, and the anthropic influence. Radiocarbon dating of a sample next to the bottom of the core indicates an age of 4.210 ± 40 14C yrs B.P (calibrated age). It was possible to establish four palynological zones. Starting at the bottom of the core, a decrease in palynomorph concentration, the presence of degraded pollen grains and spores, and the predominance of ombrophilous forest pollen grains were observed in the basal portion of Zone I. These data may indicate the presence of an exuberant Atlantic Forest, dominated by a marine regressive event. The concentration of well-preserved...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Quaternary Palynology; Guanabara Bay; Paleoenvironment.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000200005

Interdisciplinary paleovegetation study in the Fernando de Noronha Island (Pernambuco State), northeastern Brazil
Provedor de dados: 42
Autores: Pessenda,Luiz C.R.; Gouveia,Susy E.M.; Ledru,Marie-Pierre; Aravena,Ramon; Ricardi-Branco,Fresia S.; Bendassolli,José A.; Ribeiro,Adauto de S.; Saia,Soraya E.M.G.; Sifeddine,Abdelfettah; Menor,Eldemar de A.; Oliveira,Sônia M.B. de; Cordeiro,Renato C.; Freitas,Ângela M. de M.; Boulet,René; Filizola,Heloisa F.
The aim of this research was to reconstruct vegetation changes (with climate inferences) that occurred during the Holocene in the Fernando de Noronha Island, Pernambuco State, northeastern Brazil. The research approach included the use of geochemical (mineralogy, elemental), carbon isotopes (δ13C, 14C) and pollen analyses in soil organic matter (SOM) and sediments collected in Lagoa da Viração and Manguezal do Sueste. The carbon isotopes data of SOM indicated that there was no significant vegetation changes during the last 7400 BP, suggesting that the climate was not the determinant factor for the vegetation dynamics. The pollen analysis of the sediment of a core collected in the Lagoa da Viração showed the absence of Quaternary material in the period...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Carbon isotopes; Paleovegetation; Fernando de Noronha; Holocene.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000400009

Last millennium environmental changes and climate inferences in the Southeastern Atlantic forest, Brazil
Provedor de dados: 42
Autores: Pessenda,Luiz C.R.; Saia,Soraya E.M.G.; Gouveia,Susy E.M.; Ledru,Marie-Pierre; Sifeddine,Abdelfettah; Amaral,Paula G.C.; Bendassolli,José A.
This study presents paleoenvironmental data based on pollen, elemental and isotopic compositions of organic matter (TOC, N, d13C and d15N) and 14C dating of 170 cm lake sediment record. Samplings have been made in Lagoa Grande at Parque Estadual Turístico do Alto Ribeira - PETAR, Southern São Paulo State, Southeastern Brazil. The variations in relative frequencies (in percentage) of arboreal pollen along the core range between 40 and 80%. The d13C values ranged from -23‰ to -30‰ and C/N of ~10 to 15, indicating the contribution of terrestrial C3 plants and algae in the sediment organic matter. The d15N results presented values from 3 to 4.5‰, also suggesting a mixture of algae and terrestrial C3 plants. The 14C dating indicates modern age for the shallow...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lacustrine sediment; C and N isotopes; Pollen; Atlantic Forest; Last millennium; Little Ice Age.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300019

The monotypic Brazilian genus Diacrodon is a synonym of Borreria (Spermacoceae, Rubiaceae): morphological and molecular evidences
Provedor de dados: 42
Autores: MIGUEL,LAILA M.; SOBRADO,SANDRA V.; JANSSENS,STEVEN; DESSEIN,STEVEN; CABRAL,ELSA L.
ABSTRACT Diacrodon is a monotypic genus of the tribe Spermacoceae (Rubiaceae), endemic to northeastern Brazil. Diacrodon compressus is frequently misidentified with a two lobed calyx species of Borreria, B. verticillata. Traditionally, in Spermacoceae the fruit type was considered a diagnostic character among the genera. In this sense, D. compressus presents a strongly compressed, one seeded and indehiscent fruit (vs. globose, two seeded and dehiscent fruit in B. verticillata). In this work, we address two objectives: evaluate the systematic position and determine the identity of Diacrodon in respect to other taxa. Molecular analyses using ITS and ETS indicate that D. compressus is strongly related to other species of Borreria. The morphological results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flower; Fruit; ITS-ETS dataset; Morphology; Pollen; Seed.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401397

Relationship between pollen morphology and chromosome numbers in Brazilian species of Lippia L. (Verbenaceae)
Provedor de dados: 42
Autores: Sousa,Saulo M.; Pierre,Patrícia M.O.; Torres,Giovana A.; Davide,Lisete C.; Viccini,Lyderson F.
The pollen morphology and exine structure of 17 species of Lippia L. were investigated in this work using light and scanning electron microscopy. Among the species studied, 14 showed tricolporate pollen grains, two had tri- and tetracolporate pollen grains and a single species exhibited, only tetracolporate pollen. The amb ranged from triangular to square, and the shape varied from oblate-spheroidal to prolate-spheroidal. Three different types of exine ornamentation were observed: psilate, scabrate and perforate. In addition to morphological data, we found positive association between the chromosome numbers and size of pollen grains, and also between the length and width of the colpi. The results indicate that the characteristics of pollen grains in Lippia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromosome numbers; Lippia; Palynology; Palynomorphology; Pollen; Verbenaceae.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100147

Orbicules diversity in Oxalis species from the province of Buenos Aires (Argentina)
Provedor de dados: 47
Autores: Rosenfeldt,Sonia; Galati,Beatriz Gloria.
Eleven Oxalis L. species from the province of Buenos Aires (Argentina) were investigated with scanning and transmission electron microscopes. We identified four different types and two subtypes of orbicules. We conclude that the close morphological similarity between these species is also reflected in their orbicules, and we suggest that the orbicules morphology may be a useful character in systematic studies.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Embryology; Orbicules; Oxalis; Taxonomy; Pollen.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452008000100005

Distribution of pectins in the pollen apertures of Oenothera hookeri.velans ster/+ster:
Provedor de dados: 47
Autores: Noher de Halac,I.; Cismondi,I.A.; Rodriguez-Garcia,M.I.; Famá,G.
Cell wall pectins are some of the most complex biopolymers known, and yet their functions remain largely mysterious. The aim of this paper was to deepen the study of the spatial pattern of pectin distribution in the aperture of Oenothera hookeri.velans ster/+ster fertile pollen. We used "in situ" immunocytochemical techniques at electron microscopy, involving monoclonal antibodies JIM5 and JIM7 directed against pectin epitopes in fertile pollen grains of Oenothera hookeri.velans ster/+ster. The same region was also analyzed by classical cytochemistry for polysaccharide detection. Immunogold labelling at the JIM7 epitope showed only in mature pollen labelling mainly located at the intine endo-aperture region. Cytoplasmic structures near the plasma membrane...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pectins; Monoclonal antibodies; JIM5; JIM7; Immunogold; Pollen; Sporoderm; Oenothera; Cytochemistry.
Ano: 2003
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452003000100002

Pollen morphology of Oxalis species from Buenos Aires province (Argentina)
Provedor de dados: 47
Autores: Rosenfeldt,Sonia; Galati,Beatriz G.
Pollen morphology and the degree of pollen variability within nine species and two varieties of Oxalis species from Buenos Aires Province (Argentina) were studied using light microscopy (LM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Oxalis pollen grain is generally 3-colpate and the shape is prolate spheroidal, oblate spheroidal or spheroidal. The exine is microreticulate. The brochi are circular to polygonal; brochi sizes decrease near the colpi. The colpus membrane observed in unacetolysed material, is crustate or granular. The colpus length varies within a species; the largest grains are produced in stamens with long filaments and the smallest ones in stamens with short filaments. Four pollen types are distinguished...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Oxalis; Morphology; Structure.
Ano: 2007
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452007000100002

Ubisch bodies and pollen ontogeny in Oxalis articulata Savigny
Provedor de dados: 47
Autores: Rosenfeldt,Sonia; Galati,Beatriz G.
The correlation between the ontogeny of Ubisch bodies and pollen development in Oxalis articulata was studied with Transmission Electron Microscopy (TEM). The ultrastructural changes observed during the different stages of development in the tapetal cells are related to Ubisch bodies, sporopollenin and pollen-kitt formation. The pro-orbicules have the appearance of lipid globuli and their formation is related to the endoplasmic reticulum of rough type (ERr). The lipid globules or pro-orbicules disappear in the mature Ubisch bodies, and the places that they occupied remain free of contents or with pollen-kitt.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Ubisch bodies; Ontogeny; Utrastructure; Oxalis.
Ano: 2005
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452005000300004

Palynotaxonomy of Brazilian Viguiera (Asteraceae) Species
Provedor de dados: 51
Autores: Magenta,Mara Angelina Galvão; Nunes,Alessandra De Deus; Mendonça,Cláudia Barbieri Ferreira; Gonçalves-Esteves,Vânia.
With the aim of improving inter-specific delimitation of the genus Viguiera Kunth in Brazil, a palynological analysis was undertaken with 27 taxa, representing around 77% of all occurring species. Samples were obtained from herbarium specimens and the pollen grains were analyzed through light and scanning electron microscopy. Characteristics, including the shape of the pollen grains, polar and equatorial diameter, aperture measurements, surface ornamentation and exine thickness, were registered and compared. The pollen grains were medium-sized (25 - 50 mm), isopolar and oblate spheroidal (prolate spheroidal in V. aspilioides Baker). The observed values corroborated the synonymity of some species and also highlighted certain micro-morphological differences,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asteraceae; Brazil; Compositae; Pollen; Taxonomy; Viguiera.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722010000200008

Asteraceae visited by honeybees in Argentina: a record from entomopalynological studies
Provedor de dados: 51
Autores: Telleria,María C.
Entomopalynological studies of Asteraceae in Argentina revealed that 64 taxa occurred in food stored by honeybees. The most visited plant tribes were classified according to both the type of reward provided by the different taxa and the intensity that such reward is collected by honeybees. Exotic plant taxa were intensely visited inside the disturbed areas (e.g. Cardueae and Cichorieae tribes), whereas native taxa (e.g. Barnadesioideae, Mutisieae, Astereae and Eupatorieae) were intensely visited in less disturbed areas. A large number of identified taxa of Asteraceae and the evaluation of its importance to honeybee nutrition were presented. The present study contributes to the knowledge of relationship between Asteraceae and honeybees.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Nectar; Asteraceae; Apis mellifera; Phytogeographical regions; Argentina.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722009000100009

Pollen spectrum of honey of "uruçu" bee (Melipona scutellaris Latreille, 1811)
Provedor de dados: 57
Autores: CARVALHO,C. A. L. de; MORETI,A. C. de C. C.; MARCHINI,L. C.; ALVES,R. M. de O.; OLIVEIRA,P. C. F. de.
In spite of the importance of the "uruçu" bee as honey producer of excellent quality, as well, potential pollinator both in agricultural and natural ecosystems, mainly in North-eastern Brazil, just some information is found in literature about sources that such bees utilize to collect nectar and pollen. The identification of the plants visited by Melipona scutellaris was accomplished with base on the analysis of pollen types found in the honey samples collected every two months, from March 1997 to February 1998, in 15 colonies located in Catu, State of Bahia, Brazil (12°21'00"S, 38°22'40"W, 76 m of altitude). Qualitative and quantitative analysis of the pollen types were carried out determining the percentage and occurrence classes. Twenty-eight pollen...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Honey; Bee plants; Meliponinae.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100009

Comparison of Pollen Production and Quality Characteristics of Cultivated and Wild Almond Species
Provedor de dados: 117
Autores: Bayazit,Safder; Califkan,Oguzhan; Imrak,Burhanettin.
There are several wild almond species in Turkey included Amygdalus orientalis (Mill.), Amygdalus turcomanica (Lincz.), Amygdalus fenzliana (Fritsch) Lipsky, Amygdalus trichamygdalus (Hand.-Mazz.) Woronow, Amygdalus arabica (Olivier), and Amygdalus webbii (Spach). These species offer a great value for the almond improvement; we studied the pollen viability, germination ratio and pollen yield for seven genotypes of A. orientalis, seven genotypes of A. turcomanica all growing under natural conditions in Southeastern Anatolia (Gaziantep and §anliurfa provinces, Turkey). Almond cultivars (Prunus dulcis [Mill.] D.A. Webb) obtained from Pozanti Agricultural Experimental Station, Cukurova University, were also used in the experiment. The pollen viabilities of...
Tipo: Journal article
Palavras-chave: Pollen.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400006

Life Table Parameters and Consumption Rate of Cydnodromus picanus Ragusa, Amblyseius graminis Chant, and Galendromus occidentalis (Nesbitt) on Avocado Red Mite Oligonychus yothersi (McGregor) (Acari: Phytoseiidae, Tetranychidae)
Provedor de dados: 117
Autores: Rioja S,Tommy; Vargas M,Robinson.
The avocado red mite Oligonychus yothersi (McGregor) is the major leaf pest in Chile’s avocado orchards. Itaffects leaf physiology and makes it necessary to seek new natural enemies to interact with low population densities of O. yothersi. The potentiality of three predator mites: Cydnodromus picanus Ragusa, Amblyseius graminis Chant, and Galendromus occidentalis (Nesbitt) was evaluated under laboratory conditions (27 ± 1.93ºC, 87 ± 3.61% H.R. and 16:8 (L:D) photoperiod) on avocado leaf disks Persea americana Mill. var. Hass (Ø = 5 cm) by separately feeding eggs, immature, and adult females of O. yothersi, and registering postembryonic development, consumption, as well as life table parameters. The postembryonic development of C. picanus was significantly...
Tipo: Journal article
Palavras-chave: Postembryonic development; Predation; Pollen; Biological control.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000200005

Study of preparations of bee pollen extracts, antioxidant and antibacterial activity
Provedor de dados: 64
Autores: Carpes,Solange Teresinha; Begnini,Rosicler; Alencar,Severino Matias de; Masson,Maria Lúcia.
The aim of this study was to determine the antioxidant activity, phenolic content and antibacterial activity of pollen extracts obtained with different concentrations of ethanol. Each extraction condition (ethanol solutions from 40 to 90%) had a different effect in the phenolic compounds content. Although, the pollen extract obtained at 60, 70 and 80% of ethanol showed relatively higher levels of phenolic compounds (&gt;10 mg/g) and did not present statistical significant difference between the extraction conditions. The amount of total phenolics ranged from 3.6 to 8.1 and 6.6 to 10.9 mg GAE/g for Alagoas state and Parana state pollen, respectively. The higher value for antioxidant activity index was 83.30% for the pollen from Alagoas state and 81.15 % for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pollen; Antioxidant; Antibacterial activity.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542007000600032